We'll see. I think Trump might be saying things and doing things, to the Russians and Ukrainians, that we aren't privvy to, so I'm not yet completely sceptical.
I think he is personally invested in this getting done before the Mid-term elections.
Discussion
This I also assume, that he is highly invested into peace. But I would clearly say that to him it is not of importance to strengthen the free world.
He is intrested for peace by any means and gain the nobel price. This is a personal game, where I can find no opportunity how this serves the free world.